Lightning-rod



(No Model.)

L. L. MAST.

LIGHTNING ROD. No. 895,399. Patented Jan. 1, 1889.

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lUNrran Snares LOUIS I1. MAST, OF EST MILTON, OHIO.

LIGHTNINGHROD.

SPECIFICATION forming part of Letters Patent N 0. 395,399, dated January 1, 1889.

Application filed March 29, 1888. fierial No. 263,920. (No model.)

To all whom it may concern:

Be it known that I, LOUIS L. MAST, a citizen of the United States, residing at lYest Milton, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in Lightning-Rods; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which. it app er tains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked ihereon, which form a part of this specification.

My invention relates to 'iniprovelnents in lightning-rods; and the several features consist of, first, the manner of securing the edges of the copper plate covering the central iron core; second, in the manner of attaching the connection-burr to the sections of rods; third, the manner of uniting the burrs to form the connection for sectionsot' rods.

The objects are the improvement of lightning-rods in thesl-e several features. These objects are attainml, by the niechanirun illustrated in the lttfillllhlllyl11g drawings, in which- Figure l is a view ol jtdllttl sections oi a lightning-rod. Fig. 2 is an enlarged transverse section ot the rod. Fig. 3 a central longitudinal section ot' a pair of connectionburrs. Fig. 4. is a view ol. the end of a rod with a slot through it. Fig. 5 is a transverse section of the connection-burrs on line 1 11 Fig. 1. Fig. 6 a transverse section of the burr on the line .r, Fig. 1.

Like letters designate like pa rt s lhroughout the several views.

The shape of my improved rod is identical with those in use, having a central core of iron, with four flanges having converging outlines and the edges being equidistant, and over this is a covering of the copper plate -i. It has been the practice in putting on plate to simplyoverlap the edges. I do it by interlocking the edges, so that in bending the rod,as is requisite in attaching the same to buildings, the plate does not rise from its core, but remains snugly in connection therewith. The manner of interlocking the edges of the copper plate is illustrated at Fig. 2.

The copper plate is bent about the core and its inner edge is bent out, and the outer is bent at nearly a right angle and is then folded within the groove formed in the former, and the parts are pressed firmly together. Connection-burrs have been attached to sections of lightningrods in a variety of ways, and that mode most allied to my plan is that of placing a burr having a quad rangular opening over the end of the flanged or star rod and pressing the metal, of the burr tightly between the flanges. Burrs thus attached are liable to be pulled oil, and to obviate this I cast the burrs with small lugs T on the interior. A slot, 6, is punched (see Fig. l) at the center, and this engages the said lug as the metal of the burr is pressed down between the flanges, and this makes the fastening to the end of the rod entirely secure. The connection-burrB comprises two parts-the male 1 and the female i3-and these are attached to the ends of sections of rods A and A, as above specified. The two portions of the burr have radial orifices 8 and the sernicircu lar grooves around the interior of the two parts, thus form i ng il 10 ci reuin t'eren tial, groove 9. To unite the parts the wire 3 put through the radial orifices, when the two parts of the burr are brought together and a turn is given. This operation draws the wire into the circular gooove formed by the two parts and thus they are firmly united. It i s customary to construct lightning-rods in sec tions and unite them as they are being attached to buildings, and these burrs are for this purpose.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. In alightn in g-conductor, the li anged core A, infolded with copper plate 1, and the edges thereof inwrapped by the upturned edge of one side being infolded by the other, substan tially as shown and described.

2. In a lightnin g-conductor, connection-lnirr having a square orifice to embrace the end of a flanged rod, said orifice provided with pro jection 7 to enter orifice 6 of said flanged rod as said burris compressed between the flanges of said rod to securely unite the same, substantially as set forth.

ICO

3. The connection-burr B of mated parts 1 In testimony that I claim the foregoing as and 2, having square orifices in the outer ends my own I affix my signature in presence of two to embrace sections of. rods, and each part witnesses.

having coincident semicircular circumferen- LOUIS L. MAST. 5 tial grooves and coincident radial orifices, *itnesses:

with wire adapted tosaid orifices to unite said B. PICKERING,

parts, substantially as shown and described. 0. E. DAVIDSON. 

